牛心坨油田潜山油藏储层裂缝研究

Study on fractures of buried hill reservoir in Niuxintuo oil field

以辽河盆地西部凹陷牛心坨潜山构造裂缝型变质岩储层为研究对象，首先在实际岩心观察描述的基础上，给出了表征储层裂缝的八个定量表征参数；然后利用单井测井资料进行特殊处理，给出了单井裂缝方位及纵向上裂缝分布规律；最后应用三维有限元技术，在储层裂缝形成期（沙四期）构造应力场数值模拟的基础上．进行构造裂缝的三维定量预测，给出了裂缝的方位．以及裂缝密度的三维分布状况，为该油藏勘探开发提供了地质依据，也为类似油藏的研究，提供了新的思路和方法。

The study object of this paper is fractured metamorphic rock reservoir of Niuxintuo buried hill structure in west depression of Liaohe basin' Based on actural core observation and description, this paper presents 8 quantitaive parameters representing reservoirfractures ; then these parameters are specially treated according to single well logging data;and sigle well fracture orientation and vertical fracture distribution pattern are made clear;atlast,three-dimensional quantitative prediction about structural fracture is carried out by using technology of three-dimensional fiqite element on basis of numerical modeling of tectonicstress field during forming phase (Sha 4 period )of reservoir fracture,then fracture orientation and three-dimensional distribution of fracture density are made clear. This paper provides geoIogical basis for explorating and developing of this reservoir,and also provides newtrain of thought for studying of similar reservoirs.